SA9105E 查看數據表（PDF） - South African Micro Electronic Systems
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产品描述 (功能)
比赛名单
SA9105E
South African Micro Electronic Systems
SA9105E Datasheet PDF : 12 Pages
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SA9105E
The formula for calculating the Output Frequency (f) is given below:
f = 11.16
*
FOUTX
FOSC
* 3.58MHz
*
(II1 IV1) + (II2 IV2) + (II3 IV3)
3 * IR2
Where FOUTX = Nominal rated frequency (4Hz, 290Hz or 1160Hz)
FOSC = Oscillator frequency (2MHz ...... 4MHz)
I , I , I = Input currents for current inputs (16µA at rated)
I1 I2 I3
IV1, IV2, IV3 = Input currents for voltage inputs (14µA at rated)
I
= Reference current (typically 50µA)
R
XTAL is a colour burst TV crystal (f = 3.5795 MHz) for the oscillator. The oscillator
frequency is divided down to 1.7897 MHz on-chip, to supply the digital circuitry and the
A/D converters.
Figure 1: Application Circuit for Three Phase Power/Energy Measurement.
MAINS VOLTAGES
LINE 1
LINE 2
R1
R1A
R2
R2A
LINE 3
R3
R3A
N
C4
0V
1
40
C5
2
39
3
38
FROM CTs
4
C6
37
R18
5
36
VI1P
R8 6
35
VI1N
R19
VI2P
R 9 7 SA9105A 34
R10
8
33
VI2N
R20
VI3P
R11
9
DIP-40
32
R12
10
31
VI3N
R13
11
IC-1
30
12
29
2.5V
2.5V C7
13
28
14
27
C8
15
26
16
25
17
24
0V
18
23
19
22
20
21
XTAL
5V
C9
R7
C10
R15 + C1
R16 + C2
R17 + C3
2.5V
R6 R5 R4 R21
C11
C14
5V P6 P5
C13
0V
FOUT3
FOUT2
FOUT1
0V
0V
0V
DR-00233
C12
R14
P14
0V
44/12
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